The Dynamat has an adhesive backing. When cutting pieces to fit, rough cut them to the area to be applied and then use the box cutter to fit the piece into its permanent home. Don't bother trying to cut a hole for fittings. Instead, use a blow dryer and a roller to form the mat to is surface. The hole will appear as a depression that you can punch out with a screwdriver. Dynamat sells a rubber roller that excels at forming the mat. Don't worry about covering the entire floor. Instead, add the mat to areas where you'll contact the floor or any large flat areas. The dynmat stops panel resonance and acts as a start to the heat blocking.
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